Is Brass Magnetic? The Surprising Truth About Brass and Magnets

Brass is a popular metal alloy used in everything from jewelry to plumbing fixtures, but many people wonder: Is brass magnetic? The short answer is no, pure brass is not magnetic—but there are important exceptions you should know about.

Why Brass Is Usually Non-Magnetic

Brass is an alloy made primarily of copper (60-80%) and zinc (20-40%), neither of which are magnetic. This gives brass its key characteristic:

✔ Non-magnetic properties – A standard magnet will not stick to pure brass.
✔ Corrosion-resistant – Ideal for marine and plumbing applications.
✔ Excellent conductivity – Used in electrical components.

When Brass Might Appear Slightly Magnetic

While pure brass shouldn't attract a magnet, some brass alloys can show weak magnetic responses due to:

1. Iron or Steel Contamination

• Cheap brass items may contain traces of iron from manufacturing.

• Test: If a magnet sticks strongly, it's likely brass-plated steel.

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2. Leaded Brass (Free-Cutting Brass)

• Some brass alloys (e.g., C36000) contain 1-3% lead for easier machining.

• Test: A magnet may show very weak attraction (not strong like steel).

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3. Improper Alloy Mixing

• If zinc and copper aren't perfectly blended, small iron impurities may remain.

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Conclusion

True brass is not magnetic, but some low-quality or mixed alloys may show slight attraction. If a magnet sticks strongly, your item is likely brass-plated steel. For verification, use a magnet test + scratch test or consult a professional.